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Warmest sea in Ireland in August

169 coastal locations in Ireland ranked by their typical August sea temperature. Region-wide average in August: 16.0°C. The top of the list is where to find the warmest swimming this month.

Warmest in August

Ardmore

16.7°C August mean in Ireland

Regional August average

16.0°C

across all 169 coastal locations in Ireland

Vs annual mean

+3.7°C

above the year-round regional average

What the Ireland sea feels like in August

At this temperature, water will feel cold compared to a swimming pool, but with a bit of experience and practice most people will find the water relatively comfortable to swim in.

Ireland monthly average 9.0°C to 16.0°C
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  • Warmest month August 16.0°C
  • Coldest month February 9.0°C
  • Annual mean 12.3°C
  • Months above 20°C 0 of 12

Where August fits in the year

August sits inside the regional pattern shown on the left. Pick a different month to see how the ranking shifts.

All twelve Ireland month rankings:

Ireland sea temperature map (live)

The map shows today's latest reading at every Ireland location. The list below is based on the typical August mean, useful for trip planning weeks or months ahead.

Zoom in to see individual locations. Click a pin for water temperatures. View list →
°C -2 0 1 3 5 7 9 11 13 15 17 19 21 24 27 30 35

Top 50 warmest Ireland locations in August

Sorted by the typical August mean built from a decade of daily readings at each location. Click any place for its 30-day chart, monthly profile, and full 10-year history.

# Location August mean
1 Ardmore 16.7°C
2 Coney Island County Clare 16.7°C
3 Foynes Island County Limerick 16.7°C
4 Gaillimh County Galway 16.7°C
5 Galway City County Galway 16.7°C
6 Limerick Harbour County Limerick 16.7°C
7 Liscannor County Clare 16.7°C
8 Mellon Point County Limerick 16.7°C
9 Oranmore County Galway 16.7°C
10 Ballycotton County Cork 16.7°C
11 Carrigaholt County Clare 16.6°C
12 Tarbert Island County Kerry 16.6°C
13 Inishmore (Killeany Bay) County Galway 16.6°C
14 Kilkieran County Galway 16.6°C
15 Youghal 16.6°C
16 Castletownshend County Cork 16.6°C
17 Ballyheige County Kerry 16.5°C
18 Cork City County Cork 16.5°C
19 Crosshaven County Cork 16.5°C
20 Kilbaha Bay County Clare 16.5°C
21 Marino Point County Cork 16.5°C
22 Ringaskiddy County Cork 16.5°C
23 Roberts Cove County Cork 16.5°C
24 Garryvoe 16.5°C
25 Galway 16.5°C
Show 25 more ▸
26 Lahinch 16.5°C
27 Limerick 16.5°C
28 Salthill 16.5°C
29 Shannon 16.5°C
30 Spanish Point 16.5°C
31 Garretstown Beach 16.5°C
32 Kilbrittain 16.5°C
33 Kinsale 16.5°C
34 Aran Islands 16.4°C
35 Ballybunion 16.4°C
36 Doolin 16.4°C
37 Kilkee 16.4°C
38 Kilrush 16.4°C
39 Baltimore County Cork 16.4°C
40 Clonea 16.4°C
41 Dungarvan 16.4°C
42 Courtmacsherry County Cork 16.3°C
43 Fenit 16.3°C
44 Kerry 16.3°C
45 Tralee 16.3°C
46 Clonakilty 16.3°C
47 Carrigaline 16.3°C
48 Cobh 16.3°C
49 Cork 16.3°C
50 Myrtleville 16.3°C

Coldest 10 in Ireland in August

Same data the other way. Helpful if you want to know which Ireland coasts to avoid for swimming in August.

# Location August mean
1 Moville 14.9°C
2 Inishtrahull County Donegal 14.9°C
3 Buncrana 15.1°C
4 Bulbinbeg County Donegal 15.2°C
5 Malin Head County Donegal 15.2°C
6 Trawbreaga Bay County Donegal 15.2°C
7 Belmullet 15.3°C
8 Achill Island 15.4°C
9 Cranford Bay County Donegal 15.4°C
10 Fanad Head County Donegal 15.4°C

More on this region